Full Product Manual

ROCKWOOL
16
Board Products
ROCKWOOL stone wool board products, such as
ROCKWOOL Comfortboard
®
80, should be permanently
attached using mechanical fasteners, insulation pins or
appropriate attachment measures based on the end-use
application.
Mechanical Fasteners
For the permanent attachment of ROCKWOOL board
insulation, ROCKWOOL recommends the boards be
mechanically attached using mechanical fasteners with
minimum 2” diameter washers.
Impaling Pins
Mechanically attached impaling pins are an acceptable
attachment method for plain board insulation. Adhesive-
backed impaling pins can also be considered for the
permanent attachment of ROCKWOOL board insulation.
In this case, ROCKWOOL recommends seeking validation
from the attachment and/or adhesive manufacturer to
determine if the impaling pins can adequately support
the insulation and that the adhesive is compatible with
the substrate upon which it will be adhered.
Adhesive Directly Applied to ROCKWOOL Boards
ROCKWOOL does not recommend the use of adhesives
directly applied to ROCKWOOL board insulation for
permanent attachment. However, a construction grade
adhesive can be used for the temporary attachment of
ROCKWOOL boards, before connections are installed
for permanent attachment. Construction grade adhesives
must be compatible with ROCKWOOL stone wool
(mineral wool) boards and the intended substrate so
that the adhesive does not damage the substrate or
negatively affect its performance.
Number of Fasteners or Impaling Pins
When supporting ROCKWOOL semi-rigid and rigid
insulation boards using only mechanical fasteners or
impaling pins, ROCKWOOL recommends a minimum
of 5 attachments per board. When ROCKWOOL boards
are installed within a cladding attachment system,
fastening requirements may vary based on the end-use
application. Fasteners should be numerous enough and
of large enough cross section to prevent tear-through
of the insulation under expected conditions. Fore more
information, refer to ROCKWOOL’s Board Insulation
Attachment Guide.
Selection of Fasteners or Impaling Pins
Fasteners or impaling pins should be:
• Chosen in accordance with the substrate type,
• Capable of withstanding applied pull-out and shear-
loads,
• Sufciently durable to withstand the environment to
which they will be exposed.
Fastener Depth
Embedded fastener depth will vary based on substrate.
As a general rule, embed a minimum of 1.5” deep in
wood studs and concrete. Extend at least 3 full threads
past the ange of steel studs. Anti-unwinding fasteners
(or alternative precautions) should be used for metal
frame construction. The embedment should be validated
with the fastener manufacturer.
Attachment of Board Insulation